"Blood Feud" is a 320-page book of anecdotes about the issues and name calling that went on between two of the nation's most prominent political couples, which the Times said is "an unauthorized and barely sourced account full of implausible passages."

The book does not only detail clashes between the famous couples, but squabbles among the married partners themselves. For example, in one section Klein, a former editor at Newsweek and The New York Times Magazine, says former President Bill Clinton demanded Hillary get a face-lift, and when she refused, he got one himself.

Klein also quotes a friend of Obama's as saying that he gets "so fed up" with his wife's behavior that "he actually encourages Michelle to take separate planes when they go on vacation, so he doesn’t have to fly with her."

"The suspenseful page-turner paints a Shakespearean (if unbelievable) portrait of power, lust and clashes between and within the two first families," Amy Chozick and Alexandra Alter of the Times wrote. "In one passage, Mr. Clinton says: 'I hate that man Obama more than any man I’ve ever met, more than any man who ever lived.' In another, Michelle Obama refers to Mrs. Clinton as 'Hildebeest.'"

Clinton has embarked on a national tour to publicize her book, but critics have called it "dry" and not very revealing, Fox News reported.

There are some conservative doubters when it comes to Klein's book. Radio talk show host Rush Limbaugh is quoted by the Times as saying while he isn't "alleging it doesn't exist, it isn't true," still "some of the quotes strike me as odd, in the sense that I don't know people who speak this way."

Klein said he stands by what he wrote, and compared his techniques to those of The Washington Post's Bob Woodward, The Times said.

In the week ending July 5, The Times reported, "Blood Feud" had sold 20,105 copies, compared to 16,646 copies of "Hard Choices."